/Engine/Source/Runtime/SignalProcessing/Public/DSP/LinearInterpFractionalDelay.h
InMaxDelay sets the maximum allowable delay that this object can support. The minimum delay is 0.0 InNumInternalBufferSamples sets the maximum block processing size.
FLinearInterpFractionalDelay ( int32 InMaxDelay, int32 InMaxNumInternalBufferSamples )